I dont know what to do

This might be a little long but I'll try to explain it the best I can. So when me and my husband were getting to know each other before we were in a relationship I told him that I really wanted kids. He had 2 girls from a previous relationship. He told me he would like more kids. I did make it clear that I wanteted more than 1. I never wanted an only child. Fast forward to 1 year into our marriage and we have our son. I believe I am truly blessed to have my son. I dont want it to sound like I'm not extremely grateful for him. But a little over a year into our marriage my husband says that he never wanted more than 1 more kid. He figured I would change my mind about more than one so he didnt say anything and he went along with what I wanted in Hope's I would change my mind. After child support got established for his girls he no longer tries to see them and gave up on even trying to talk to them. He refuses to fight for basic rights to see them. Well a few months ago we had some major problems and he got really close to another girl (claims he never cheated though) and he decided he didnt want to be with me anymore. After lots of talking we decided to try to work things out but he gave me a choice to either divorce him or let him get a vasectomy. I dont necessarily blame him for not wanting more kids but he lied to me for the first year and a half of our relationship about wanting more. He took my family dreams away. And I die a little on the inside with each pregnancy announcement I see knowing that he wont let me have that dream because he didnt want it but didnt tell me that from the beginning.